amf201091
Member
Has anyone ever cut out the hood vents on their stock hood? I was contemplating on doing this since I've never seen it.
If you want to, go for it. However, you won’t benefit much, if any, from doing so. If you’re looking to lessen engine compartment temps, I’d suggest something along the lines of a heat extraction hood.
I'd like to hear from this "somebody," and see their measurements. I removed the weatherstrip (thinking the same thing), placed a thermocouple above this point, and the air remained at ambient temperature. The area in front of the windshield is a high-pressure zone, so air isn't escaping from under the hood.Just remove the rubber gasket at the back of the hood where it meets the cowl when closed. That will give you an opening one inch by the width of the hood. Somebody took a before and after underhood measurement while open tracking and this free upgrade lowered the temp by ten degrees
You are talking about NACA vents.I know I read somewhere at some time that they were designed to work by a physics property called the venturi effect. It creates suction by air passing over a hole which then sucks the hot air out of the bay. Its used more often in airplanes to cool engine bays because it doesn't create drag like a big scoop does. If you look at the bottom of the hood under the fire blanket you will see a series of holes along the back of the hood to allow the air to get sucked up into the void. I can't prove this but it always made sense to me.
exactly. To make them really functional they need to be deeper but the stock hood is a similar design. Realistically just blowing air across the opening will create a vacuum just like is shown in this vid.You are talking about NACA vents.
I'd like to hear from this "somebody," and see their measurements. I removed the weatherstrip (thinking the same thing), placed a thermocouple above this point, and the air remained at ambient temperature. The area in front of the windshield is a high-pressure zone, so air isn't escaping from under the hood.
I wish I could remember his name. He was a local autocrosser and mechanical mechanical engineer who worked with me at GE. He was friends with Bruce Griggs and would use his Terminator Cobra as a test mule for new Griggs parts and helped me sort out my suspension.I'd like to hear from this "somebody," and see their measurements. I removed the weatherstrip (thinking the same thing), placed a thermocouple above this point, and the air remained at ambient temperature. The area in front of the windshield is a high-pressure zone, so air isn't escaping from under the hood.
I am not sure where you placed your thermocouple.I wish I could remember his name. He was a local autocrosser and mechanical mechanical engineer who worked with me at GE. He was friends with Bruce Griggs and would use his Terminator Cobra as a test mule for new Griggs parts and helped me sort out my suspension.
Just behind the trailing edge of the hood.I am not sure where you placed your thermocouple.